79f42e0dc97d34d8a4880dc2814bf2f978c55a64c5fb20eae316bdab9738f04c

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:28

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General

Target

2024-05-23_2d7da028c08fc9ff4d119505bb5983c4_cryptolocker.exe
Size

60KB
MD5

2d7da028c08fc9ff4d119505bb5983c4
SHA1

7f05ef63e1beda3fe41970410be4363a6faaf609
SHA256

79f42e0dc97d34d8a4880dc2814bf2f978c55a64c5fb20eae316bdab9738f04c
SHA512

a71a0426dd299a8583a8040d356742a1d554e123f872bc3c3b4e037e8965b0b4679664927282c7a50999bfda39a4fb3efffcb47b54f4e50e947dae48f778855a
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3N:z6a+CdOOtEvwDpjQq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/996-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/996-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2216-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/996-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/996-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2216-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/996-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/996-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2216-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-23_2d7da028c08fc9ff4d119505bb5983c4_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-23_2d7da028c08fc9ff4d119505bb5983c4_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2216 asih.exe

pid	process
2216	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/996-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/996-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2216-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_2d7da028c08fc9ff4d119505bb5983c4_cryptolocker.exe

description	pid	process	target process
PID 996 wrote to memory of 2216	996	2024-05-23_2d7da028c08fc9ff4d119505bb5983c4_cryptolocker.exe	asih.exe
PID 996 wrote to memory of 2216	996	2024-05-23_2d7da028c08fc9ff4d119505bb5983c4_cryptolocker.exe	asih.exe
PID 996 wrote to memory of 2216	996	2024-05-23_2d7da028c08fc9ff4d119505bb5983c4_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_2d7da028c08fc9ff4d119505bb5983c4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_2d7da028c08fc9ff4d119505bb5983c4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:996

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2216

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
61KB

MD5
52da76f31122c3d6f99dcc2501ce7968

SHA1
54203c43fd1701f2623c5c52db522a007f766d6e

SHA256
4719307797223494ac888c1eb86cc7596a103a6fb3a9f0d96f76aeb06de30ea5

SHA512
2e6ad07c3906c75fe4da2c829e88624f729072c6ddedc63d3268d4cae5a3a8fc6ebc19f98fd23ca3ce1ba8328d13191c93ab7d64f8f676c2fb9d302d29579ea9

Download Submit
memory/996-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/996-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/996-2-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/996-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/996-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2216-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/2216-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2216-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download